*{
	margin: 0;
	padding: 0;
}
li{
	list-style: none;
}
a{
	text-decoration: none;
	color: #333;
}
i{
	font-style:normal;
}
img,input{
	/* 1.先定义图片 搜索框
	   2.给父元素 垂直居中行高等于高*/
	vertical-align: middle;
}
/* ::after{
	content: "";
	display: block;
	clear: both;
	width: 0px;
	height: 0px;
	visibility: hidden;
} */